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RE: Copper in Blue and Green Dyes



Becky,  

The EPA P2 guide for the textile industry has a lot of good information on
this subject.  They list specific non-Cu blue dyes that may be used as
substitutes.  You can also reduce Cu by using direct dyes, which on average
have half the Cu and twice the affinity of reactive dyes, the largest US
class.  Direct dyes are usually cheaper as well but, as Dr. Boyter
indicated, they are not washfast.  If washfastness is a requirement, they
would need to do MgCl afterfixing.  I'm attaching a brief summary of the EPA
info.

Phil Bevilacqua
New Jersey Technical Assistance Program
973-596-5863  


-----Original Message-----
From: Becky Lockart [mailto:EPA8611@epa.state.il.us]
Sent: Thursday, February 24, 2000 1:34 PM
To: p2tech@great-lakes.net; KMMILLS@smtpgate.dphe.state.co.us
Subject: Re: Copper in Blue and Green Dyes 


P2 Tech -

Does anyone know if there are any blue and green dyes that do not contain
copper? Or contain a reduced amount of copper?

Thank you,  Becky





Becky Lockart
Office of Pollution Prevention
Illinois Environmental Protection
1021 North Grand Avenue East
P.O. Box 19276
Springfield, IL  62794-9276
217/524-9642 (voice)
217/557-2125 (fax)
epa8611@epa.state.il.us

copper.DOC